Well, my "Band" (not really official yet) is performing at our talent show, but i am having trouble writing slower music to go with an acoustic piece the other guitarist wrote. I was just wondering if anyone had any tips for writing a slower song, because I usually write faster songs then this.
Best way to learn how to write any new type of music is to immerse yourself in music the music that you want to write. Find your favorite "slow" songs, analyze them, and see what makes them slow.
Long bends and legato can make slow songs really come alive. Try Looking Through Her Eyes by Dream Theater or the slower solo at the beginning of In The Presence Of Enemies.
Slow songs/ballads usually center around a strong melody. Think of a nice singable melody, then put some chords to it, look for interesting resolves.